Over the past five years, your investment provided the following percentage returns: Year Annual Return 2016 6.785% 2017 3.485% 2018 2.380% 2019 -3.456% 2020 10.260% Calculate the following statistics: (1/1000 of one percent without % sign, e.g. 12.671, if a negative percentage, -9.56): 1) Arithmetic mean for annual returns Answer 2) Standard deviation (sample): Answer Assume that the frequency distribution of annual returns followed a normal distribution. What is the range that you would expect the annual returns to fall within 95% of the time? 3) Lower limit of annual return Answer 4) Upper limit of annual return Answer